Display Page Content After Return Back To The First Page

Question

hi friends..
In WebForms Asp.NET, I have a page containing Some Textboxes..After I enter Data in the Textboxes and Navigate to Nextpage and again i return to the first page through a link..Then the data int the textBoxes of the first page is Showing Empty...But What i need is that the Data In The Textboxes should be remain even i return from the next page (without using Database)...pls someone help me ...i am new to this concept...
 
thanks in advance